Mary cCmndhd (pronounced "Skuhmithid" and anglicized as "Smith"), a member of a Qwghlmian immigrant community living in Australia, who catches the attention of Lawrence Waterhouse while he is stationed in Brisbane. Randall "Randy" Lawrence Waterhouse, eldest grandson of Lawrence and Mary Waterhouse (née cCmndhd) and an expert systems and network administrator with the Epiphyte(2) corporation. He is mentioned in Stephenson's 2019 novel Fall, in which he has amassed a fortune that led to the creation of a charitable Foundation bearing his name.

America "Amy" Shaftoe, Doug Shaftoe's daughter (and Bobby Shaftoe's granddaughter) who has moved from the U.S. to live with Doug in the Philippines, and who becomes Randy's love interest. United States. Patent Office (1886). Specifications and Drawings of Patents Relating to Electricity Issued by the U. S. pp.80–81. In the new element there can be used advantageously as exciting-liquid in the first case such solutions as have in a concentrated condition great depolarizing-power, which effect the whole depolarization chemically without necessitating the mechanical expedient of increased carbon surface. It is preferred to use iron as the positive electrode, and as exciting-liquid nitro muriatic acid, ( aqua regis,) the mixture consisting of muriatic and nitric acids. The nitro-muriatic acid, as explained above, serves for filling both cells. For the carbon-cells it is used strong or very slightly diluted, but for the other cells very diluted, (about one-twentieth, or at the most one-tenth.) The element containing in one cell carbon and concentrated nitro-muriatic acid and in the other cell iron and dilute nitro-muriatic acid remains constant for at least twenty hours when employed for electric incandescent lighting. Alliteration: occurs when the poet repeats the same consonant sounds at the beginning of multiple words. For example, “Bonny Bobby” and “Bobby” and “bright.”The action takes place in two periods—World War II and the late 1990s, during the Internet boom and the Asian financial crisis.

Goldberg, Ian. "Solitaire cryptosystem: verbose version". schneier.com. Archived from the original on February 20, 2019. Tom Howard, a member of Epiphyte(2), a libertarian and firearms enthusiast who is an expert in large computer installations. Lady Henrietta Frances Spencer mentioned above provides the links to three particularly notable personalities, whose public lives require no further elaboration.

Günter Bischoff, a Kapitänleutnant in the Kriegsmarine, who commands a U-boat for much of the story, and later takes command of a new, advanced submarine fueled with hydrogen peroxide. According to Stephenson, the title is a play on Necronomicon, the title of a book mentioned in the stories of horror writer H. P. Lovecraft: Admiral Isoroku Yamamoto's 1943 death at the hands of U.S. Army fighter aircraft during Operation Vengeance over Bougainville Island fills an entire chapter. During his fateful flight, the Commander-in-Chief of the Japanese Imperial Navy's Combined Fleet reflects upon the failures and hubris of his Imperial Army counterparts, who persistently underestimate the cunning and ferocity of their Allied opponents in the Pacific Theatre of Operations. As his damaged transport plane completes its terminal descent, Yamamoto realizes that all of the Japanese military codes have been broken, which explains why he is "on fire and hurtling through the jungle at a hundred miles per hour in a chair, closely pursued by tons of flaming junk."

Andrew Loeb, a former friend and now Randy's enemy, a survivalist and neo-Luddite whose lawsuits destroyed Randy and Avi's first start-up, and who at the time of the novel works as a lawyer for Hubert Kepler. He is referred to by Randy as " Gollum," comparing him to that character in the novels of J. R. R. Tolkien. Goto Dengo, a lieutenant in the Imperial Japanese Army and a mining engineer involved in an Axis project to bury looted gold in the Philippines. In the present-day storyline, he is a semi-retired chief executive of a large Japanese construction company, Goto Engineering. Several of the characters in the book communicate with each other through the use of one-time pads. A one-time pad (OTP) is an encryption technique that requires a single-use pre-shared key of at least the same length as the encrypted message. Anaphora: a type of repetition that occurs when the poet repeats the same word or words at the beginning of lines. In this case, “Bobby Shafto’s” starts the first line and fifth line.Robert Shafto (sometimes spelt Shaftoe) (circa 1732 – 24 November 1797) was a British politician who sat in the House of Commons between 1760 and 1790. He was the likely subject of a famous North East English folk song and nursery rhyme " Bobby Shafto's Gone to Sea" ( Roud #1359).